Electrolyte discharging device in production process of sodium ion battery

Abstract

The utility model discloses an electrolyte discharging device in a sodium ion battery production process, and particularly relates to the field of soft package battery production. The extruding part comprises a support baffle, a pressurizing pressure plate and a driving part, a placing space for placing the battery in a vertical state is arranged in the support baffle, the pressurizing pressure plate is arranged in the placing space and is located on the side face of the battery in parallel, and the driving part is used for driving the pressurizing pressure plate to move along a straight line and extruding the battery at the same time; the driving component comprises a motor and a lead screw, the lead screw penetrates through the support baffle and the battery cell clamp and then is in threaded transmission with the pressurizing pressure plate, and the curvature center of the arc-shaped base is located on the axis of the lead screw. The change of the weight of the battery is monitored in real time through the weighing part, the ending time of the extrusion process is determined in time, operation is easy, and efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production field of soft package battery, more specifically, the utility model relates to a kind of electrolyte discharge device in sodium ion battery production process. BACKGROUND

[0002] In the production process of lithium ion and sodium ion soft package battery, due to the instability of electrolyte characteristics and liquid injection equipment in the liquid injection process, the liquid injection amount is different, and there are cases of too much liquid and too little liquid. Since the battery after liquid injection needs to be placed, vacuumed and sealed before weighing, it is only at this stage that it can be determined whether the liquid injection amount is appropriate.

[0003] The battery with too little liquid can be repaired by manually opening the opening, supplementing the liquid and sealing. After the battery with too much liquid is placed and vacuumed, the electrolyte and the pole piece are well infiltrated, and the excess electrolyte cannot be completely squeezed out by applying a small pressure (such as manual squeezing). Manual squeezing can cause uneven stress on the battery, causing irreparable damage. The battery with too much liquid will be soft and have a thickness exceeding the standard in the later process, affecting Pack assembly, and in severe cases, it can even affect the electrochemical performance. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of the utility model provide a kind of electrolyte discharge device in sodium ion battery production process, and the technical problems to be solved by the utility model are: how to squeeze out the excess electrolyte in the battery to ensure the consistency of the appearance and performance of the battery.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of electrolyte discharge device in sodium ion battery production process, including weighing part;Extrusion part, including support baffle, pressurizing pressure plate and driving component, the placing space for placing the battery in vertical state is provided in support baffle, pressurizing pressure plate is also placed in placing space and is parallel to the side of battery, driving component is used to drive pressurizing pressure plate to move along straight line and extrude battery;Liquid discharge port, which is opened at any corner of the lower side of the battery.

[0006] In a preferred embodiment, the placing space of the support baffle is placed with a battery clamp, the extrusion space is formed in the battery clamp, the battery and the pressurizing pressure plate are arranged in the extrusion space, and the pressurizing pressure plate and the battery clamp are slidingly connected.

[0007] In a preferred embodiment, one side of the extrusion space is open, and the other side is closed.

[0008] In a preferred embodiment, the cross section of the pressurizing pressure plate is smaller than the cross section of the battery to be extruded.

[0009] In a preferred embodiment, the bottom of the battery cell clamp is provided with a lifting member, comprising an arc-shaped base fixed to the bottom of the battery cell clamp and a transmission component, the transmission component comprising an arc-shaped rack and a gear wheel engaged with each other, the arc-shaped rack being fixed to the arc-shaped surface of the arc-shaped base, and the gear wheel being driven to rotate by a second motor.

[0010] In a preferred embodiment, the driving component comprises a motor and a screw rod, the motor being mounted on the bracket baffle, the output shaft of the motor being fixedly connected with the screw rod, the screw rod being threadedly connected with the pressing plate from one side through the bracket baffle, the battery cell clamp and the pressing plate, the center of curvature of the arc-shaped base being located on the axis of the screw rod, and the motor being electrically connected with the controller.

[0011] In a preferred embodiment, the pressing plate is provided with a boss outwardly protruding from the end surface of the battery, and the boss is internally provided with an internal thread.

[0012] In a preferred embodiment, the stator and the rotor of the motor are driven by magnetic force, and the stator and the rotor are not in contact with each other.

[0013] In a preferred embodiment, the driving component is an electric cylinder, the cylinder base of the electric cylinder being fixed to the bracket baffle, a transmission screw rod extending out of the cylinder base being rotatably connected with the pressing plate from one side through the bracket baffle, the battery cell clamp and the pressing plate, the center of curvature of the arc-shaped base being located on the axis of the transmission screw rod, and the electric cylinder being electrically connected with the controller.

[0014] In a preferred embodiment, the bottom area of the bracket baffle is smaller than the area of the weighing member tray.

[0015] The technical effects and advantages of the present application are as follows:

[0016] The present application uniformly extrudes the battery by using the extrusion member, extrudes excessive electrolyte from the soft-pack battery, and monitors the weight change of the battery in real time by the weighing member, so that the end time of the extrusion process is determined in time, and the operation is simple and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the technical solutions of the present application, and form a part of the present application. The embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application.

[0018] Figure 1 FIG. 1 is a structural diagram of an electrolyte discharge device according to the present application.

[0019] Figure 2 FIG. 2 is a side view of a battery cell clamp according to the present application.

[0020] Figure 3 FIG. 3 is a front view of the battery cell clamp according to the present application.

[0021] Figure 4 For Figure 3 Enlarged view of A in the middle.

[0022] The figure is marked as: 1, the weighing part; 2, the extrusion part; 21, the bracket baffle; 22, the battery cell clamp; 23, the pressurizing pressure plate; 24, the driving part; 3, the liquid discharge port; 4, the lifting part; 41, the arc base; 42, the transmission part. DETAILED DESCRIPTION

[0023] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art. The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure. The drawings are not intended to be restrictive in any way.

[0024] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more example implementations. In the following description, numerous specific details are provided to give a thorough understanding of example implementations of the disclosure. One skilled in the relevant art will recognize, however, that the

[0025] Example 1

[0026] As Figures 1-3 A kind of electrolyte discharge device in sodium ion battery production process, mainly by extruding electrolyte in battery, simultaneously, using weighing part to obtain the change of battery weight in real time, to realize the accurate control of the discharge amount of electrolyte to outside.

[0027] Weighing part 1 is a common electronic scale that can be used for weighing, and its accuracy is selected appropriately.

[0028] Extrusion part 2 is arranged on the scale pan of weighing part 1 as a whole, and extrusion part 2 includes bracket baffle 21, battery cell clamp 22, pressurizing pressure plate 23 and driving part 24.

[0029] Bracket baffle 21 is provided with a placing space, and battery cell clamp 22 is placed in the placing space. Battery cell clamp 22 is provided with an extrusion space, and pressurizing pressure plate 23 is located in the extrusion space and is slidably connected with battery cell clamp 22. Driving part 24 is used to push pressurizing pressure plate 23 to move in battery cell clamp 22.

[0030] Preferably, the shape of the extrusion space is vertical and flat, so that after the soft-pack battery is placed, the battery will not be tilted, and the battery can immediately adhere to the vertical pressure plate 23 after being extruded, improving the degree of uniform pressure on the battery.

[0031] Preferably, one side of the cell clamp 22 is open, used to extend the soft-pack battery outward, and the other side is closed, serving as a positioning purpose, allowing the side edge of the soft-pack battery to abut against the closed side of the cell clamp 22 during positioning.

[0032] One embodiment of the present embodiment: the driving component 24 includes a lead screw and a motor, the motor is installed outside the support baffle 21, and the lead screw fixed with the motor output shaft is in threaded transmission connection with the end face of the pressure plate 23 in sequence after penetrating the support baffle 21, the cell clamp 22, and the pressure plate 23, the pressure plate 23 and the cell clamp 22 are in sliding connection, so that when the driving component 24 drives the lead screw to rotate, the pressure plate 23 will move back and forth in the extrusion space, in the present embodiment, the motor and the controller are electrically connected, and the user can realize precise control of the motor speed by operating the controller.

[0033] Preferably, the end face of the pressure plate 23 away from the battery is raised outward to form a boss, and the boss is provided with internal threads, the existence of the boss can increase the number of internal threads, so that the lead screw can drive the movable stroke of the pressure plate 23,

[0034] Before use, place the battery in the extrusion space and let the battery be on the moving path of the pressure plate 23, then cut any one of the two corners of the battery downward to form a drainage port 3.

[0035] The user drives the pressure plate 23 to move in the cell clamp 22 and extrude the battery by controlling the motor to operate, and the electrolyte in the battery is discharged from the drainage port 3.

[0036] After the extrusion part 2 is completely arranged on the weighing part 1, the value of the weighing part 1 is zeroed, then the battery is placed in the extrusion part 2, the value at this time is recorded as G1, the motor is started and slowly discharges, the display reading of the weighing part 1 is observed constantly, until G2, the motor is stopped, at this time the discharging link is completed, the motor is started in reverse rotation, the cell clamp 22 is loosened, and the battery is quickly taken out.

[0037] The value of G2 in the above operation process is predetermined in advance and is related to the product batch of the battery.

[0038] Although there is still a phenomenon of electrolyte overflowing from the drainage port 3 after the motor is stopped, it is a small amount and within the allowable error range.

[0039] Another embodiment of the present embodiment, the drive component 24 with motor, screw is replaced by electric cylinder, electric cylinder through the built-in motor rotation, through the speed reducer to reduce the speed and increase the torque, and then through the transmission screw rod to convert the rotary motion into linear motion, so as to realize the precise linear displacement of the piston rod. Wherein the cylinder seat and the bracket baffle 21 outside the fixed, the end of the transmission screw rod through the bracket baffle 21, electric cylinder clamp 22 and the pressure plate 23 connected, through the opening of electric cylinder, transmission screw rod can make the pressure plate 23 in the extrusion space to move linearly, to extrude the battery.

[0040] Need to know that the structure of the electric cylinder is prior art, the above is only listed to cooperate with the electric cylinder and the components of the present embodiment, and no further description is made.

[0041] Embodiment 2

[0042] As Figures 1-4 On the basis of embodiment 1, the electrolyte discharge device further comprises a lifting member 4, which is used to adjust the angle of the battery after the electrolyte is discharged. By lifting the position of the liquid discharge port 3 upward, the probability of excessive overflow of the electrolyte after the liquid discharge is completed is reduced.

[0043] The lifting member 4 comprises an arc-shaped base 41 and a transmission component 42. The arc-shaped base 41 is fixed to the bottom of the electric cylinder clamp 22 and is tangent to the inner bottom surface of the placement space. In this way, the electric cylinder clamp 22 can drive the internal pressure plate 23 and the battery to swing in the placement space. The transmission component 42 comprises gears and an arc-shaped rack that are engaged with each other. The arc-shaped rack is fixed to the arc-shaped edge of the arc-shaped base 41. The gears are fixedly connected with the output shaft of the second motor. The second motor is installed on the bracket baffle 21 and is electrically connected with the controller. The user can control the rotation of the output shaft of the second motor by adjusting the controller. When the second motor drives the gears to rotate, the electric cylinder clamp 22 can drive the battery to swing and lift the height of the liquid discharge port 3 by using the engagement relationship between the gears and the arc-shaped rack.

[0044] When the electric cylinder clamp 22 swings, the pressure plate 23 connected with the screw rod may interfere with the electric cylinder clamp 22 due to the existence of the friction angle. At this time, the motor of the drive component 24 is selected as an alternating current motor, such as a squirrel cage induction motor.

[0045] Because there is no direct contact between the rotor and the stator in the squirrel cage induction motor, but the action is through the rotating magnetic field, so the friction resistance is small, when the battery cell clamp 22 is lifted, the battery cell clamp 22 drives the pressing pressure plate 23 to deflect synchronously, at this time the pressing pressure plate 23 can drive the output shaft of the motor to rotate in a small range through the screw rod in reverse, so as to reduce the interference between the pressing pressure plate 23 and the battery cell clamp 22 when lifting the battery cell clamp 22, and because the squirrel cage induction motor is prior art, therefore, it is not described here.

[0046] When the motor selects the direct contact DC motor between the stator and the rotor, the controller needs to control the output shaft of the motor to rotate to drive the screw rod to rotate when lifting the battery cell clamp 22, at this time the rotation angle of the screw rod and the rotation angle of the pressing pressure plate 23 are the same, avoiding the interference between the screw rod, the pressing pressure plate 23 and the battery cell clamp 22.

[0047] In the second embodiment in embodiment 1, when the driving part 24 is an electric cylinder, when the battery cell clamp 22 is lifted, the transmission screw rod end of the electric cylinder and the pressing pressure plate 23 are rotationally connected, and the center of curvature of the arc-shaped base 41 is located on the axis of the transmission screw rod, so at this time there is no much interference problem to be considered.

[0048] In summary, the device has the following advantages:

[0049] 1. Using the device can ensure that the battery cell is uniformly stressed when being extruded.

[0050] 2. The device is attached with a weighing function, which can monitor the weight of the battery cell in real time and ensure the amount of electrolyte remaining in the battery cell.

[0051] 3. The device is simple to operate and has no safety risk.

[0052] 4. The device has low production cost and does not have high assembly precision requirements.

[0053] The benefits of the device are that the application uniformly extrudes the battery by using the extrusion part 2, extrudes too much electrolyte from the soft package battery, and monitors the weight change of the battery in real time through the weighing part 1, determines the end time of the extrusion process in time, and is simple to operate and efficient.

[0054] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

[0055] Finally should be explained a few points are: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the term "installation", "connected", "connection" should be broad, can be mechanical or electrical connection, but also can be two elements inside the communication, can be directly connected, "up", "down", "left", "right" and so on, only for indicating the relative position relationship, when the absolute position of the described object changes, the relative position relationship may change;

[0056] Second: the utility model discloses the embodiment in the drawing, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of not conflicting, the same embodiment and different embodiments of the utility model can be combined with each other;

[0057] Finally: the above only for the preferred embodiment of the utility model has, and does not for limiting the utility model, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A kind of electrolyte discharge device in sodium-ion battery production process, it is characterized in being: Weighting piece (1); Extrusion piece (2), located on the scale pan of weighting piece (1), including support baffle (21), pressurized pressure plate (23) and driving component (24), support baffle (21) is provided with the space for letting battery be placed in vertical state in, pressurized pressure plate (23) is also placed in space and is parallel to the side of battery, driving component (24) is used to drive pressurized pressure plate (23) along straight line movement while extruding battery; Liquid discharge port (3), open in any corner of the lower side of battery.

2. The device for discharging electrolyte in the production process of sodium-ion battery according to claim 1, characterized in that: The space in support baffle (21) is placed with battery cell clamp (22), and extrusion space is formed in battery cell clamp (22), and battery and pressurized pressure plate (23) are arranged in extrusion space, and pressurized pressure plate (23) and battery cell clamp (22) are slidingly connected.

3. The device for discharging electrolyte in the production process of sodium-ion battery according to claim 2, characterized in that: One side of the two sides of the extrusion space is open, and the other side is closed. 4.The device for discharging electrolyte in the production process of sodium-ion battery according to claim 2 or 3, characterized in that: The cross section of the pressurized pressure plate (23) is smaller than the cross section of the extruded battery.

5. The device for electrolyte discharge in the production of sodium-ion batteries according to claim 2, characterized in that: The bottom of the battery cell clamp (22) is provided with a lifting member (4), including an arc-shaped base (41) and a transmission member (42), the arc-shaped base (41) is fixed to the bottom of the battery cell clamp (22), the transmission member (42) includes an arc-shaped rack and a gear that are engaged with each other, the arc-shaped rack is fixed to the arc surface of the arc-shaped base (41), and the gear is driven to rotate by a second motor.

6. The electrolyte discharge device in the production process of a sodium-ion battery according to claim 5, characterized in that: The driving component (24) includes a motor and a lead screw, the motor is installed on the support baffle (21), the output shaft of the motor is fixedly connected with the lead screw, the lead screw penetrates through the support baffle (21), the battery cell clamp (22), and the pressurized pressure plate (23) from one side in a threaded transmission manner, the curvature center of the arc-shaped base (41) is located on the axis of the lead screw, and the motor and the controller are electrically connected.

7. The device for electrolyte discharge in the production of sodium-ion batteries according to claim 6, characterized in that: The end surface of the pressurized pressure plate (23) away from the battery outwardly protrudes a boss, and an internal thread is formed in the boss.

8. The device for electrolyte discharge in the production of sodium-ion batteries according to claim 6, characterized in that: The stator and the rotor of the motor are driven by magnetic force, and the stator and the rotor do not contact each other.

9. The device for discharging electrolyte in the production process of sodium-ion battery according to claim 5, characterized in that: The driving component (24) is an electric cylinder, the cylinder seat of the electric cylinder is fixed to the support baffle (21), the transmission screw rod protruding from the cylinder seat is rotatably connected with the support baffle (21), the battery cell clamp (22), and the pressurized pressure plate (23) from one side, the curvature center of the arc-shaped base (41) is located on the axis of the transmission screw rod, and the electric cylinder and the controller are electrically connected.

10. The device for electrolyte discharge in the production of sodium-ion batteries according to claim 1, characterized in that: The bottom area of the support baffle (21) is smaller than the area of the scale pan in the weighting piece (1).

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